Abstract
Microheterogeneous water swelling polymer compositions containing highly dispersed semiconductive component CuS have been obtained on the basis of PVA-PAA mixtures. Average CuS particle size range is 8–13 nm. The formation of highly dispersed CuS phase takes place upon attraction of coordinately bonded (immobilized) Cu2+ ions and sulfide ions. The interaction occurs directly in polymer matrix bulk (in situ method). According to IR spectroscopy data, the state of Cu2+ ions in polymer matrix is characterized by formation of coordination centers with donor-acceptor and ionic bonds between Cu2+ and carboxylic groups of PAA. Structure characteristics of highly dispersed polymer-CuS compositions (particle size distribution, crystallite size, specific surface, concentration) and phase boundary intermolecular interactions type in polymer CuS compositions have been studied using X-ray scattering and IR spectroscopy methods. Such compositions possess rather high swelling (∼400 wt%) and under hydrogel state display good mechanical properties (E=0.6 MPa,σb MPa, ɛ=370%) and permeability (∼2 l/m2·h).
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